Feature Request: Parent Task Column

A while ago, I posted a request to include the "parent tasks" as a separate column, rather than using the indenting method. I know you don't comment on timeframes, and I still find Toodledo very useful, but I just wanted to reiterate what a great feature I think this would be.

They really need a "dependent task" list -- that is, a list of tasks that the current task depends on. This would enable a more project planning style in task management. Of course, with this, it would be really good if you could say, once all dependent tasks for this task are done, automatically move the status of this task from (say) "Active" to "Next Action".